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Differentiate Between Spontaneous and Stimulated Emission. - Applied Physics 2

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Distinguish Between

Differentiate between spontaneous and stimulated emission.

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Solution

Sr.no. Spontaneous emission Stimulated emission
1. When an atom in an excited state makes a transition into ground state by emission of photon, without any external stimulus, it’s called spontaneous emission. When an atom in an higher energy state is forced by a photon to make a transition into ground state resulting into emission of another photon is called stimulated emission.
2. It is not useful for LASER. It is useful for LASER.
3. Spontaneous emission does not require an external electromagnetic stimulus to release energy Stimulated emission does require external electromagnetic stimuli to release energy.
4. The probability of spontaneous emission to take place is higher than the probability for stimulated emission to take place The probability of stimulated emission to take place is higher than the probability for spontaneous emission to take place

 

Concept: Spontaneous Emission and Stimulated Emission
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